THE DALLES, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 40.8 47.2 56.8 64.7 72.9 79.2 86.8 87.3 79.9 66.8 50.2 41.7 64.5
Highest Mean Max. Temperature (F) 49.6 53.0 62.7 70.0 79.2 86.9 94.5 93.6 86.5 74.5 55.5 47.2 94.5
Year Highest Occurred 1999 1991 1992 1977 1992 1992 1985 1986 1998 1988 1999 1999 1985
Lowest Mean Max. Temperature (F) 24.3 37.9 50.9 59.3 66.5 73.2 79.0 81.8 73.0 61.6 39.6 27.3 24.3
Year Lowest Occurred 1979 1989 1971 1975 1977 1981 1993 1976 1978 1984 1985 1985 1979
Mean Temperature (F) 34.9 39.5 46.7 53.5 60.9 67.2 73.5 73.1 65.4 54.3 42.8 36.2 54.0
Highest Mean Temperature (F) 41.6 44.6 51.4 57.7 64.9 73.3 79.4 77.7 70.7 61.3 48.1 40.7 79.4
Year Highest Occurred 1994 1992 1992 1990 1993 1992 1998 1977 1990 1988 1995 1973 1998
Lowest Mean Temperature (F) 17.9 30.1 42.0 48.7 56.0 63.3 67.4 68.1 59.7 51.5 32.8 24.4 17.9
Year Lowest Occurred 1979 1989 1971 1975 1999 1971 1993 1975 1985 1975 1985 1985 1979
Mean Min. Temperature (F) 29.0 31.8 36.6 42.2 48.8 55.2 60.1 58.8 50.9 41.7 35.4 30.6 43.4
Highest Mean Min. Temperature (F) 36.0 38.9 41.9 45.9 51.9 59.8 65.2 64.4 55.8 48.0 41.2 35.5 65.2
Year Highest Occurred 1981 1992 1983 1990 1987 1992 1998 1977 1990 1988 1983 1973 1998
Lowest Mean Min. Temperature (F) 11.5 22.4 32.4 38.0 42.9 51.3 55.8 53.9 46.4 35.8 26.1 21.5 11.5
Year Lowest Occurred 1979 1989 2000 1982 1999 1976 2000 1975 1985 1999 1985 1985 1979
Mean Precipitation (in.) 2.62 2.07 1.20 0.85 0.54 0.42 0.18 0.36 0.48 0.96 2.03 2.77 14.48
Highest Precipitation (in.) 5.69 4.87 3.21 1.87 1.84 1.53 1.32 1.77 1.90 3.42 4.32 6.82 6.82
Year Highest Occurred 1996 1986 1983 1992 1990 1981 1995 1983 1982 1994 1984 1996 1996
Lowest Precipitation (in.) 0.08 0.17 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.35 0.33 0.00
Year Lowest Occurred 1985 1988 1981 1977 1992 1978 2000 2000 1999 1988 1993 1976 1977
Heating Degree Days (F) 933. 713. 567. 348. 163. 54. 12. 10. 91. 337. 665. 895. 4788.
Cooling Degree Days (F) 0. 0. 0. 2. 34. 120. 273. 259. 103. 3. 0. 0. 794.

Western Regional Climate Center, wrcc@dri.edu